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Bifunctional magnetic nanoparticles as well as preparation method and application thereof

A magnetic nanoparticle, bifunctional technology, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of non-recyclable materials, secondary pollution efficiency, etc., and achieve mild conditions, simple preparation process, and broad The effect of the application foreground

Inactive Publication Date: 2021-09-24
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a bifunctional magnetic nanoparticle and its preparation method and application, to solve the technical problems such as the materials used in the traditional water treatment method in the prior art cannot be recycled, secondary pollution will occur and the efficiency is low.

Method used

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  • Bifunctional magnetic nanoparticles as well as preparation method and application thereof
  • Bifunctional magnetic nanoparticles as well as preparation method and application thereof
  • Bifunctional magnetic nanoparticles as well as preparation method and application thereof

Examples

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Embodiment 1

[0031] Embodiments of the present invention provide a method for preparing bifunctional magnetic nanoparticles, the specific steps are as follows:

[0032] S1. FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 COONa was added to the ethylene glycol solution and dissolved under ultrasonic conditions, and then magnetically stirred at a rate of 800rpm for 45min to obtain a precursor solution; wherein FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 The mass ratio of COONa is 2:4:1;

[0033] S2. Put the precursor solution in step S1 at 200°C for 10h to obtain magnetic Fe 3 o 4 nanoparticles, after cooling to room temperature, the magnetic Fe was collected by a magnet 3 o 4 Nanoparticles were washed 3 times or more with ethanol and deionized water;

[0034]S3. Add concentrated hydrochloric acid to deionized water to prepare dilute hydrochloric acid solution, dissolve tris in deionized water to obtain Tris solution, adjust the pH value of Tris solution to 8.3 to 8....

Embodiment 2

[0037] This embodiment is a preferred embodiment of the present invention, on the basis of Embodiment 1, only the magnetic Fe of solution A is changed. 3 o 4 The concentration of nanoparticles is 0.002g / mL, the concentration of dopamine hydrochloride in solution B is 0.004g / mL, and the concentration of 2,3-dimercaptosuccinic acid in solution C is 0.002g / mL; the magnetic Fe 3 o 4 The mass ratio of nanoparticles, dopamine hydrochloride and 2,3-dimercaptosuccinic acid is 1:2:1.

Embodiment 3

[0039] This embodiment is a preferred embodiment of the present invention, on the basis of Embodiment 1, only the magnetic Fe of solution A is changed. 3 o 4 The concentration of nanoparticles is 0.002g / mL, the concentration of dopamine hydrochloride in solution B is 0.002g / mL, and the concentration of 2,3-dimercaptosuccinic acid in solution C is 0.004g / mL; the magnetic Fe 3 o 4 The mass ratio of nanoparticles, dopamine hydrochloride and 2,3-dimercaptosuccinic acid is 1:1:2.

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Abstract

The invention discloses a bifunctional magnetic nanoparticles and a preparation method and application thereof, and belongs to the technical field of magnetic nanoparticle modification, magnetic Fe3O4 nanoparticles are used as a core, and 2, 3-dimercaptosuccinic acid is grafted on dopamine to obtain a PDA-DMSA coating which is used as a modification shell. The DMSA is 2, 3-dimercaptosuccinic acid, and the PDA is polydopamine. As a heavy metal adsorbent, the Fe3O4@PDA-DMSA nanoparticles can efficiently capture heavy metal Pb (II) and Cu (II) ions by using active sulfydryl and carboxyl on DMSA, and have wide application prospects in the field of heavy metal pollution treatment.

Description

technical field [0001] The invention belongs to the technical field of modification of magnetic nanoparticles, and in particular relates to a bifunctional magnetic nanoparticle and its preparation method and application. Background technique [0002] In recent years, with the rapid development of global industrial activities, heavy metal pollution has posed a serious threat to human health and ecosystems due to their high toxicity and non-biodegradability. Cu 2+ , Pb 2+ 、Cd 2+ , Hg 2+ etc. are common heavy metal pollutants, they will accumulate in organisms through the food chain, causing damage to the health of animals and humans. Therefore, the removal of heavy metal ions in wastewater is becoming more and more important. Researchers have adopted many methods to remove heavy metals from water, such as chemical precipitation, ion exchange, membrane separation and adsorption, etc. Among them, the adsorption method is currently the most widely used method, and is consid...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/48C02F101/20
CPCB01J20/265B01J20/08B01J20/28009B01J20/3085B01J20/3071C02F1/288C02F1/488C02F2101/20C02F2303/16
Inventor 王世雄雷婷白慧萍杨项军饶建涛苏莎
Owner YUNNAN UNIV
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